赫布根坝是土筑的结构，在麦迪逊河进入麦迪逊峡谷处有一个无加固凝土的芯墙。
Hebgen dam, an earthfill structure with an unreinforced concrete corewall located on the madison river at its entrance to madison canyon.
三角洲平原分流河道沉积底部泥砾较发育，沼泽沉积中发育植物根和褐煤沉积；三角洲前缘河口砂坝沉积物粒度较平原决口扇粗。
Mud gravel is often found in the base of distributary channel sediment, plant root and lignite often develop in the swamp sediment.
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